/*
 * Copyright 2011-2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.sabayframework.mem.impl.disk;

public final class DataLogStats implements Comparable<DataLogStats>{
	public int logNumber;
	public int entries;
	public long usedBytes;
	public long totalBytes;
	public long maxBytes;
	public boolean locked; //currently used in a transaction
	
	public double getUsageRatio(){
		if(totalBytes==0) return 0;
		return 1.0 * usedBytes / totalBytes;
	}
	public double getUtilizationRatio(){
		if(maxBytes==0) return 0;
		return 1.0 * usedBytes / maxBytes;
	}
	public double getFillRatio(){
		if(maxBytes==0) return 0;
		return 1.0 * totalBytes / maxBytes;
	}

	public int compareTo(DataLogStats other) {
		double diff = getUtilizationRatio() - other.getUtilizationRatio();
	    if(diff<0) return -1;
	    if(diff>0) return 1;
		return logNumber - other.logNumber;
	}
	
	
}
